<s>
in	O
disjunctive	B-Application
logic	I-Application
programming	I-Application
.	O
</s>
<s>
The	O
following	O
is	O
a	O
program	O
in	O
Datalog	B-Language
extended	O
with	O
negation	B-Application
as	I-Application
failure	I-Application
:	O
</s>
<s>
The	O
following	O
query	O
has	O
a	O
single	O
stable	B-Application
model	I-Application
:	O
</s>
